They probably were not created correctly. This can happen very easily. You should be able to correct them yourself with the GalCiv Writer that H50 made (see GalCiv Writer thread).
#2
by Diplomat HawaiiFive-O - 9/18/2003 6:59:50 PM
There's also a bug report I haven't had the chance to verify for myself that Invasion Tactics ignore tech requirements.
I plan to test this over the weekend, though I'm pretty sure that I have tested it before and it *does* work.
If you screw up the Tech Requirement name, it won't work properly, perhaps this is what is happening. I don't know yet.